mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-11-01 15:11:24 +00:00
29da637826
Hopefully this will fix the i686/msvc build failure described at: http://bb.pgr.jp/builders/ninja-clang-i686-msc18-R/builds/803 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@234977 91177308-0d34-0410-b5e6-96231b3b80d8
312 lines
11 KiB
C++
312 lines
11 KiB
C++
//===-- RuntimeDyldMachO.cpp - Run-time dynamic linker for MC-JIT -*- C++ -*-=//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// Implementation of the MC-JIT runtime dynamic linker.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "RuntimeDyldMachO.h"
|
|
#include "Targets/RuntimeDyldMachOAArch64.h"
|
|
#include "Targets/RuntimeDyldMachOARM.h"
|
|
#include "Targets/RuntimeDyldMachOI386.h"
|
|
#include "Targets/RuntimeDyldMachOX86_64.h"
|
|
#include "llvm/ADT/STLExtras.h"
|
|
#include "llvm/ADT/StringRef.h"
|
|
|
|
using namespace llvm;
|
|
using namespace llvm::object;
|
|
|
|
#define DEBUG_TYPE "dyld"
|
|
|
|
namespace {
|
|
|
|
class LoadedMachOObjectInfo : public RuntimeDyld::LoadedObjectInfo {
|
|
public:
|
|
LoadedMachOObjectInfo(RuntimeDyldImpl &RTDyld, unsigned BeginIdx,
|
|
unsigned EndIdx)
|
|
: RuntimeDyld::LoadedObjectInfo(RTDyld, BeginIdx, EndIdx) {}
|
|
|
|
OwningBinary<ObjectFile>
|
|
getObjectForDebug(const ObjectFile &Obj) const override {
|
|
return OwningBinary<ObjectFile>();
|
|
}
|
|
};
|
|
|
|
}
|
|
|
|
namespace llvm {
|
|
|
|
int64_t RuntimeDyldMachO::memcpyAddend(const RelocationEntry &RE) const {
|
|
unsigned NumBytes = 1 << RE.Size;
|
|
uint8_t *Src = Sections[RE.SectionID].Address + RE.Offset;
|
|
|
|
return static_cast<int64_t>(readBytesUnaligned(Src, NumBytes));
|
|
}
|
|
|
|
RelocationValueRef RuntimeDyldMachO::getRelocationValueRef(
|
|
const ObjectFile &BaseTObj, const relocation_iterator &RI,
|
|
const RelocationEntry &RE, ObjSectionToIDMap &ObjSectionToID) {
|
|
|
|
const MachOObjectFile &Obj =
|
|
static_cast<const MachOObjectFile &>(BaseTObj);
|
|
MachO::any_relocation_info RelInfo =
|
|
Obj.getRelocation(RI->getRawDataRefImpl());
|
|
RelocationValueRef Value;
|
|
|
|
bool IsExternal = Obj.getPlainRelocationExternal(RelInfo);
|
|
if (IsExternal) {
|
|
symbol_iterator Symbol = RI->getSymbol();
|
|
StringRef TargetName;
|
|
Symbol->getName(TargetName);
|
|
RTDyldSymbolTable::const_iterator SI =
|
|
GlobalSymbolTable.find(TargetName.data());
|
|
if (SI != GlobalSymbolTable.end()) {
|
|
const auto &SymInfo = SI->second;
|
|
Value.SectionID = SymInfo.getSectionID();
|
|
Value.Offset = SymInfo.getOffset() + RE.Addend;
|
|
} else {
|
|
Value.SymbolName = TargetName.data();
|
|
Value.Offset = RE.Addend;
|
|
}
|
|
} else {
|
|
SectionRef Sec = Obj.getRelocationSection(RelInfo);
|
|
bool IsCode = Sec.isText();
|
|
Value.SectionID = findOrEmitSection(Obj, Sec, IsCode, ObjSectionToID);
|
|
uint64_t Addr = Sec.getAddress();
|
|
Value.Offset = RE.Addend - Addr;
|
|
}
|
|
|
|
return Value;
|
|
}
|
|
|
|
void RuntimeDyldMachO::makeValueAddendPCRel(RelocationValueRef &Value,
|
|
const ObjectFile &BaseTObj,
|
|
const relocation_iterator &RI,
|
|
unsigned OffsetToNextPC) {
|
|
const MachOObjectFile &Obj =
|
|
static_cast<const MachOObjectFile &>(BaseTObj);
|
|
MachO::any_relocation_info RelInfo =
|
|
Obj.getRelocation(RI->getRawDataRefImpl());
|
|
|
|
bool IsPCRel = Obj.getAnyRelocationPCRel(RelInfo);
|
|
if (IsPCRel) {
|
|
uint64_t RelocAddr = 0;
|
|
RI->getAddress(RelocAddr);
|
|
Value.Offset += RelocAddr + OffsetToNextPC;
|
|
}
|
|
}
|
|
|
|
void RuntimeDyldMachO::dumpRelocationToResolve(const RelocationEntry &RE,
|
|
uint64_t Value) const {
|
|
const SectionEntry &Section = Sections[RE.SectionID];
|
|
uint8_t *LocalAddress = Section.Address + RE.Offset;
|
|
uint64_t FinalAddress = Section.LoadAddress + RE.Offset;
|
|
|
|
dbgs() << "resolveRelocation Section: " << RE.SectionID
|
|
<< " LocalAddress: " << format("%p", LocalAddress)
|
|
<< " FinalAddress: " << format("0x%016" PRIx64, FinalAddress)
|
|
<< " Value: " << format("0x%016" PRIx64, Value) << " Addend: " << RE.Addend
|
|
<< " isPCRel: " << RE.IsPCRel << " MachoType: " << RE.RelType
|
|
<< " Size: " << (1 << RE.Size) << "\n";
|
|
}
|
|
|
|
section_iterator
|
|
RuntimeDyldMachO::getSectionByAddress(const MachOObjectFile &Obj,
|
|
uint64_t Addr) {
|
|
section_iterator SI = Obj.section_begin();
|
|
section_iterator SE = Obj.section_end();
|
|
|
|
for (; SI != SE; ++SI) {
|
|
uint64_t SAddr = SI->getAddress();
|
|
uint64_t SSize = SI->getSize();
|
|
if ((Addr >= SAddr) && (Addr < SAddr + SSize))
|
|
return SI;
|
|
}
|
|
|
|
return SE;
|
|
}
|
|
|
|
|
|
// Populate __pointers section.
|
|
void RuntimeDyldMachO::populateIndirectSymbolPointersSection(
|
|
const MachOObjectFile &Obj,
|
|
const SectionRef &PTSection,
|
|
unsigned PTSectionID) {
|
|
assert(!Obj.is64Bit() &&
|
|
"Pointer table section not supported in 64-bit MachO.");
|
|
|
|
MachO::dysymtab_command DySymTabCmd = Obj.getDysymtabLoadCommand();
|
|
MachO::section Sec32 = Obj.getSection(PTSection.getRawDataRefImpl());
|
|
uint32_t PTSectionSize = Sec32.size;
|
|
unsigned FirstIndirectSymbol = Sec32.reserved1;
|
|
const unsigned PTEntrySize = 4;
|
|
unsigned NumPTEntries = PTSectionSize / PTEntrySize;
|
|
unsigned PTEntryOffset = 0;
|
|
|
|
assert((PTSectionSize % PTEntrySize) == 0 &&
|
|
"Pointers section does not contain a whole number of stubs?");
|
|
|
|
DEBUG(dbgs() << "Populating pointer table section "
|
|
<< Sections[PTSectionID].Name
|
|
<< ", Section ID " << PTSectionID << ", "
|
|
<< NumPTEntries << " entries, " << PTEntrySize
|
|
<< " bytes each:\n");
|
|
|
|
for (unsigned i = 0; i < NumPTEntries; ++i) {
|
|
unsigned SymbolIndex =
|
|
Obj.getIndirectSymbolTableEntry(DySymTabCmd, FirstIndirectSymbol + i);
|
|
symbol_iterator SI = Obj.getSymbolByIndex(SymbolIndex);
|
|
StringRef IndirectSymbolName;
|
|
SI->getName(IndirectSymbolName);
|
|
DEBUG(dbgs() << " " << IndirectSymbolName << ": index " << SymbolIndex
|
|
<< ", PT offset: " << PTEntryOffset << "\n");
|
|
RelocationEntry RE(PTSectionID, PTEntryOffset,
|
|
MachO::GENERIC_RELOC_VANILLA, 0, false, 2);
|
|
addRelocationForSymbol(RE, IndirectSymbolName);
|
|
PTEntryOffset += PTEntrySize;
|
|
}
|
|
}
|
|
|
|
bool RuntimeDyldMachO::isCompatibleFile(const object::ObjectFile &Obj) const {
|
|
return Obj.isMachO();
|
|
}
|
|
|
|
template <typename Impl>
|
|
void RuntimeDyldMachOCRTPBase<Impl>::finalizeLoad(const ObjectFile &Obj,
|
|
ObjSectionToIDMap &SectionMap) {
|
|
unsigned EHFrameSID = RTDYLD_INVALID_SECTION_ID;
|
|
unsigned TextSID = RTDYLD_INVALID_SECTION_ID;
|
|
unsigned ExceptTabSID = RTDYLD_INVALID_SECTION_ID;
|
|
|
|
for (const auto &Section : Obj.sections()) {
|
|
StringRef Name;
|
|
Section.getName(Name);
|
|
|
|
// Force emission of the __text, __eh_frame, and __gcc_except_tab sections
|
|
// if they're present. Otherwise call down to the impl to handle other
|
|
// sections that have already been emitted.
|
|
if (Name == "__text")
|
|
TextSID = findOrEmitSection(Obj, Section, true, SectionMap);
|
|
else if (Name == "__eh_frame")
|
|
EHFrameSID = findOrEmitSection(Obj, Section, false, SectionMap);
|
|
else if (Name == "__gcc_except_tab")
|
|
ExceptTabSID = findOrEmitSection(Obj, Section, true, SectionMap);
|
|
else {
|
|
auto I = SectionMap.find(Section);
|
|
if (I != SectionMap.end())
|
|
impl().finalizeSection(Obj, I->second, Section);
|
|
}
|
|
}
|
|
UnregisteredEHFrameSections.push_back(
|
|
EHFrameRelatedSections(EHFrameSID, TextSID, ExceptTabSID));
|
|
}
|
|
|
|
template <typename Impl>
|
|
unsigned char *RuntimeDyldMachOCRTPBase<Impl>::processFDE(unsigned char *P,
|
|
int64_t DeltaForText,
|
|
int64_t DeltaForEH) {
|
|
typedef typename Impl::TargetPtrT TargetPtrT;
|
|
|
|
DEBUG(dbgs() << "Processing FDE: Delta for text: " << DeltaForText
|
|
<< ", Delta for EH: " << DeltaForEH << "\n");
|
|
uint32_t Length = readBytesUnaligned(P, 4);
|
|
P += 4;
|
|
unsigned char *Ret = P + Length;
|
|
uint32_t Offset = readBytesUnaligned(P, 4);
|
|
if (Offset == 0) // is a CIE
|
|
return Ret;
|
|
|
|
P += 4;
|
|
TargetPtrT FDELocation = readBytesUnaligned(P, sizeof(TargetPtrT));
|
|
TargetPtrT NewLocation = FDELocation - DeltaForText;
|
|
writeBytesUnaligned(NewLocation, P, sizeof(TargetPtrT));
|
|
|
|
P += sizeof(TargetPtrT);
|
|
|
|
// Skip the FDE address range
|
|
P += sizeof(TargetPtrT);
|
|
|
|
uint8_t Augmentationsize = *P;
|
|
P += 1;
|
|
if (Augmentationsize != 0) {
|
|
TargetPtrT LSDA = readBytesUnaligned(P, sizeof(TargetPtrT));
|
|
TargetPtrT NewLSDA = LSDA - DeltaForEH;
|
|
writeBytesUnaligned(NewLSDA, P, sizeof(TargetPtrT));
|
|
}
|
|
|
|
return Ret;
|
|
}
|
|
|
|
static int64_t computeDelta(SectionEntry *A, SectionEntry *B) {
|
|
int64_t ObjDistance =
|
|
static_cast<int64_t>(A->ObjAddress) - static_cast<int64_t>(B->ObjAddress);
|
|
int64_t MemDistance = A->LoadAddress - B->LoadAddress;
|
|
return ObjDistance - MemDistance;
|
|
}
|
|
|
|
template <typename Impl>
|
|
void RuntimeDyldMachOCRTPBase<Impl>::registerEHFrames() {
|
|
|
|
for (int i = 0, e = UnregisteredEHFrameSections.size(); i != e; ++i) {
|
|
EHFrameRelatedSections &SectionInfo = UnregisteredEHFrameSections[i];
|
|
if (SectionInfo.EHFrameSID == RTDYLD_INVALID_SECTION_ID ||
|
|
SectionInfo.TextSID == RTDYLD_INVALID_SECTION_ID)
|
|
continue;
|
|
SectionEntry *Text = &Sections[SectionInfo.TextSID];
|
|
SectionEntry *EHFrame = &Sections[SectionInfo.EHFrameSID];
|
|
SectionEntry *ExceptTab = nullptr;
|
|
if (SectionInfo.ExceptTabSID != RTDYLD_INVALID_SECTION_ID)
|
|
ExceptTab = &Sections[SectionInfo.ExceptTabSID];
|
|
|
|
int64_t DeltaForText = computeDelta(Text, EHFrame);
|
|
int64_t DeltaForEH = 0;
|
|
if (ExceptTab)
|
|
DeltaForEH = computeDelta(ExceptTab, EHFrame);
|
|
|
|
unsigned char *P = EHFrame->Address;
|
|
unsigned char *End = P + EHFrame->Size;
|
|
do {
|
|
P = processFDE(P, DeltaForText, DeltaForEH);
|
|
} while (P != End);
|
|
|
|
MemMgr.registerEHFrames(EHFrame->Address, EHFrame->LoadAddress,
|
|
EHFrame->Size);
|
|
}
|
|
UnregisteredEHFrameSections.clear();
|
|
}
|
|
|
|
std::unique_ptr<RuntimeDyldMachO>
|
|
RuntimeDyldMachO::create(Triple::ArchType Arch,
|
|
RuntimeDyld::MemoryManager &MemMgr,
|
|
RuntimeDyld::SymbolResolver &Resolver) {
|
|
switch (Arch) {
|
|
default:
|
|
llvm_unreachable("Unsupported target for RuntimeDyldMachO.");
|
|
break;
|
|
case Triple::arm:
|
|
return make_unique<RuntimeDyldMachOARM>(MemMgr, Resolver);
|
|
case Triple::aarch64:
|
|
return make_unique<RuntimeDyldMachOAArch64>(MemMgr, Resolver);
|
|
case Triple::x86:
|
|
return make_unique<RuntimeDyldMachOI386>(MemMgr, Resolver);
|
|
case Triple::x86_64:
|
|
return make_unique<RuntimeDyldMachOX86_64>(MemMgr, Resolver);
|
|
}
|
|
}
|
|
|
|
std::unique_ptr<RuntimeDyld::LoadedObjectInfo>
|
|
RuntimeDyldMachO::loadObject(const object::ObjectFile &O) {
|
|
unsigned SectionStartIdx, SectionEndIdx;
|
|
std::tie(SectionStartIdx, SectionEndIdx) = loadObjectImpl(O);
|
|
return llvm::make_unique<LoadedMachOObjectInfo>(*this, SectionStartIdx,
|
|
SectionEndIdx);
|
|
}
|
|
|
|
} // end namespace llvm
|